Is CVE-2026-26067 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-26067 being exploited in the wild.

How severe is CVE-2026-26067?

Medium severity, with a CVSS score of 4.9, published 21 April 2026.

Which products and versions are affected?

october/system (Packagist) ECOSYSTEM:introduced=0,fixed=3.7.14.

Is there a fix for CVE-2026-26067?

Yes. october/system (Packagist): upgrade to 3.7.14 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

Am I affected by CVE-2026-26067?

Check whether you run october/system (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-26067: October CMS has Safe Mode Bypass via CSS Preprocessor Compilers

CVE-2026-26067 · Severity: medium · CVSS 4.9 · Published 2026-04-21

October is a Content Management System (CMS) and web platform. Prior to 3.7.14 and 4.1.10, a server-side information disclosure vulnerability was identified in the handling of CSS preprocessor files. Backend users with Editor permissions could craft .less, .sass, or .scss files that leverage the compiler's import functionality to read arbitrary files from the server. This worked even with cms.safe_mode enabled. This vulnerability is fixed in 3.7.14 and 4.1.10.

Technologies: october/system (Packagist). Vendors: Packagist.

Quick answers

Is CVE-2026-26067 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-26067 being exploited in the wild.
How severe is CVE-2026-26067?: Medium severity, with a CVSS score of 4.9, published 21 April 2026.
Which products and versions are affected?: october/system (Packagist) ECOSYSTEM:introduced=0,fixed=3.7.14.
Is there a fix for CVE-2026-26067?: Yes. october/system (Packagist): upgrade to 3.7.14 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-26067?: Check whether you run october/system (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

october/system (Packagist): upgrade to 3.7.14 or later
```
composer require october/system:^3.7.14
```

Affected products

october/system (Packagist) ECOSYSTEM:introduced=0,fixed=3.7.14

Identifiers

CVE-2026-26067
GHSA-3888-q23f-x7qh

References

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